'''Theodore Roosevelt Jr.''' ( ; October 27, 1858 – January 6, 1919) was an American statesman, author, explorer, soldier, naturalist, and reformer who served as the List of Presidents of the United States|26th President of the United States
from 1901 to 1909. As a leader of the History of the United States Republican Party|Republican Party
during this time, he became a driving force for the Progressive Era
in the United States in the early 20th century.
Born a sickly child with debilitating asthma
, Roosevelt successfully overcame his health problems by embracing a strenuous lifestyle. He integrated his exuberant personality, vast range of interests, and world-famous achievements into a "cowboy" persona defined by robust masculinity
. Home-schooled, he became a lifelong naturalist before attending Harvard College
. His first of many books, ''The Naval War of...